Fluid meter



L. H. NASH.

FLUID METER.

(No Model.)

No. 280,322. Patented June 26, 1883.

.Toall whom it concern,

Be it known that I, LEwIsHALLooK NASH,-

Lew s a. NASH, or .BROOKLYh,

ssinon TO THE NATIONAL METER COMPANY, F; NEW YORK,-N. Y.

1 urel-METER,

1 "srnerr'ica'rron formiifg part or Letters Patent no. 280,322, datedJune 26, 1883.

, Application filed MBICDJBPIBISQ. 7(N0 n'imlel.)

a citizen of the United States, residing .at

Brooklyn, countyof Kings, Stateof New York, I have invented newand-useful Improvements in Fluid-.Meters, of. which the following is aspecification.

This invention relateslto registering the by the agency of a magneticconnectionabetween the'pistons or moving parts of the me-' ter and theregistering device.

The object of my improvements in meters of this'class is to perfectmeans for making this magnetic connection of the registering-gear withthe rotary pistons or moving parts, so as to render the revolution ofthe register driver or armature synchronous with the revolution of themagnet, driven by said pistons or moving parts, and thereby obtainan-exact registration of the measure of "water as it passes through themeter.

'The improvements in the construction of fluid-meters of this classshall be hereinafter described and claimed. a 4

In the accompanying drawings, Figure 1 represents a' vertical centralsection of a m eter-case and shield embracing my invention; Fig. 2 a

horizontal section of the same, taken on the line w m of Fig. 1; andFig. 3, a View of the speedreducing gear.-

The magnet A Within the meter-case is preferably of the form shown, andis connected with the rotary pistons or moving parts of the meter (notshown) by a shaft, a, in any approved mechanical way, erly journaled ina bearing, 1), at its point of passage into themeter-case. 1111. orderthat said magnet may turn with the revolution of the shaft, it isrigidly keyed to or fastened to it. The polesof this magnet approach,but do not touch, a plate, 0, of brassor any material except iron ornickel, (as it must permit of the passage of magnetic force,) whichforms the side portion of the cylindrical meter-case B, and separatessaid magnet from the armature of soft iron 0, arranged outside of themeter.-

case and revoluble upon a pin, d, projecting fromthe top of the case B,upon which pin a shaft, 6,

is stepped, carrying the pinion f, conthe magnet into a small compass.They crate to concentrate themagnetic-force; so-that part B cgcishouldsaid shaft being propnecting with ,the registering mechanism. The

meter-case Bc being made in the form of a cylinder, with ,a strong upperhead, c, a thin vertical wall portion, 0, and a strong or stout lowercylindrical portion, B, I am enabled to turn'the thin'iportion c to theleast thickness without making it-so weak as to-break under thepressure.- The armature C is bent around the cylinder, so that themagnetic force acts at its ends, and thereby the force has a greaterleverage in turning the armature, thus securing greater driving force.To the poles of the magnet I'add pieces of soft iron is k, which,adhering to the poles, draw fortli'the force of the power of a verylarge magnet may be made to act through small points of soft iron. Thepreferably be a single brass castin 'An'mclosing case or shield, -D, ofiron, surrounds the parts just described, to prevent outside magneticforces from affecting the magnet. Shouldthe meter-case be made of iron,it might itself perform such oflice; but the separating thin parts dowould necessarily be of brass or some other non-magnetic material, asbefore described.

The shaft 0 is made to revolve slower than the pistons, or parts drivenby the water, by means of speed-reducing gearing, consisting of a gear,g on the shaft a, moved by a pinion, 71, on the shaft t, connecting saidshaft with the prime mover'or rotary piston.

The shouldered. form of easing B c 0 prevents dust or other matter fromdepositing at the point of contact of magnet and armature, asall suchdeposits will fall below, where they cannot interfere with themovementof the armature.

The armature, has drop angle ends 0 C, which move around the peripheryof the thinportion c of the casing, actuated by the force of the magnetinside the thin portion. Thus there is the least possible waste of thepower of the magnet.

' I am aware that the registering device of a fluid=meter has beencontrolled by the agency of a magnetic connection of the parts revolvedby the direct action of the water and the reg-is 'tering device, inwhich a magnet revolves with the spindle of the part moved by the watercloselybelow a thin copper plate, which divides 'the meter-case properfrom the dial-chamber and from a magnet in said chamber carried by aseparate driven spindle operating the registering device, so that theupper magnet, attracted by the lower one, follows its rotary movements,and thence operates the dial mechanism. I

In my improved meter the poles of the driving-magnet are re-enforcedbysoi'tiron pieces, for the purpose of concentrating the magnetic force atthe lower ends of the depending arms of the armature. It is for thispurpose that thepart-of the case opposite the re-enforcing soft-ironparts is made thin, and it is this combination of the driving-magnetprovided with the re-enforcing soft-iron parts, the armature terminatingin drop angle ends opposite the re-enforced parts, and the vertical thin2 dividing-wall t at gives greater efficiency in the working and in themeasurement.

' I claim- In a fluid-meter, the combination, with the driven magnet A,having its poles re-enforced with soft-iron pieces k k, of the ease-topB,

-having the thin vertical wall part c c, and the armature 0, havingvertical angle ends overhanging said thin wall part, substantially asand for the purpose'set forth. 0

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

. LEWIS H. NAsH.

Witnesses:

WILLIAM M. BROWN, HORACE R. NAsH.

